【Error:qt.bluetooth: Dummy backend running】A problem about using qbluetooth

MartinChan

I am starting to do some work about bluetooth ,and I find an example on Qt tutorial and the code is like this:

#include <QCoreApplication>
#include <QBluetoothLocalDevice>
#include <QDebug>

int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);

    QBluetoothLocalDevice localDevice;
    QString localDevicename;
    if (localDevice.isValid()){
        localDevice.powerOn();
        localDevicename=localDevice.name();
        if (localDevicename.isEmpty()|localDevicename.isNull()){
            qDebug()<<"Nothing found in blue!";
        }
        localDevice.setHostMode(QBluetoothLocalDevice::HostDiscoverable);
        QList<QBluetoothAddress> remotes;
        remotes = localDevice.connectedDevices();
        qDebug()<<"The number of remoted devices is %d"<<remotes.size();
    }else qDebug()<<"My bluetooth didn't find!";

    return a.exec();
}

Nonetheless,the result told me:
qt.bluetooth: Dummy backend running. Qt Bluetooth module is non-functional.
My bluetooth didn't find!

It seems i didn't use any Virtual Machine tool or something else,so,how to solve it?

micland

@MartinChan
Unfortunately bluetooth is currently not (yet) supported on the windows platform.
(see http://doc.qt.io/qt-5/qtbluetooth-index.html)
"Currently, the API is supported on the following platforms: Android, iOS, Linux (BlueZ 4.x/5.x) and OS X"

MartinChan

@micland ：-（ So,I can't get a bluetooth API when I use windows platform?Anyone can help??( ▼-▼ )

micland

@MartinChan
I think it's planned for futurue releases but the current version (5.7) comes not with builtin BT support on windows. So you can't use bluetooth on windows without a platform specific native implementation or a 3rd party library (perhaps someone else can suggest a Qt independant solution?)

SGaist

Hi,

There's a WIP branch for Windows that you can test against. You'll need to clone the QtConnectivity module from here and checkout the wip/win branch.

MartinChan

Maybe there're two ways to solve this question:

1)Windows SDK has included the bluetooth module,if you're familiar with Windows API development,it's a good choice to transplant it to Qt.

2)There're some 3r-party sdk like Bluesoleil SDK.